What if during the next War, there was a select team of "Mercenaries"?
They would have their own vault, and use decks from their vault.
They don't participate actively in the war, but instead are hired by teams in exchange for the right to salvage if they win and a card penalty to the team hiring them. It could be similar to Underworld, in that only people who were not bidded on can join this team.
Wouldn't that be cool?
It would mean that instead of playing suicide decks, you could sacrifice a small amount of cards from your vault to hire a mercenary to fight for you.
It would also let people who did not receive bids have a chance to participate in the war without actively competing.